Welding mask



FIG. 1 is a front perspective view of a welding mask showing my new design;

FIG. 2 is a right side elevation view thereof, the left side being a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear elevation view thereof. 

The ornamental design for a welding mask, as shown and described. 